Spray gun



July 4, 1950 F. H. RlcHTERKr-:sslNG 2,513,676

SPRAY GUN Filed Nov. 7, 1944 2 Sheets-Sheet 1 Vila',

July 4, 1950 F. H. lcHfEKEssmG 2,513,676

SPRAY GUN Filed Nov. 7, 1944 2 sheets-sheet 2 7 4 4D f f 4H vy: 9 lINVENTOR.

A TTORNE} Patented July 4, 1950 lUNITED STATES PATENT OFFICE.

sPRAY GUN Frank H. Richterkessing, Louisville, Ky., assignor to W. M.Cissell Manufacturing Co., Inc., Louisville, Ky., a corporation ofKentucky Application November 7, 1944, Serial N o. 562,330

3 Claims.

A further object of the invention is to provide.

a valve construction that is sturdy, and simple to manufacture andmaintain.

The advantages o-ithese and other objects will become apparent as thefollowing description is read in connection with the accompanyingdrawings in which:

Figure 1 is a side elevational view of one embodiment of the invention;

Figure 2 is a front elevational View of Figure 1;

Figure 3 is a sectional view taken along line 3 3 of Figure 1 showingthe pivot pin 3 for the actuating lever 2, `and the hollow stem 4;

Figure 4 is a sectional view taken along line 4 4 of Figure l showingthe handle grip IG and actuating lever 2;

Figure 5 is a partial sectional view taken along line 5 5 of Figure 2;

Figure 6 is anv enlarged side elevational sectional View of the valveassembly of Figure l, showing the diaphragm I4 'and the construction andrelation of the parts within the valve chamber;

Figure 7 is a side elevational view of another embodiment of myinvention;

Figure 8 is a sectional `view taken along line 8 8 of Figure 7;

Figure 9 is a sectional view taken along line 9 9 of Figure 7;

Figure 10 is a sectional view taken along line IIJ-II) of Figure 7;'

Figure 11 is an enlarged side elevational sectional view' of the hoseconnection of Figure 7 showing the connector 6 and the guide 4D for thehollow stem 1I;

Figure l2 is an enlarged side elevational sectional view of the valveassembly of Figure 7 showing the diaphragm I4 and the construction andrelation of the parts within the valve chamber.

In the drawings, Figures 1 to 6 inclusive, illustrate one embodiment ofthe invention, while Figures 7 to 12, inclusive, show another embodimentofthe invention, and in order to facilitate the identity of similarparts in each embodiment,vv

like reference characters and numerals are employed to identify similarparts.

With reference to the drawings, it will-be.ap-,

parent that the one embodiment of. the'invention shown in Figures l toA6 is characterized by a construction having aconventional pistol gripin which the fluidis discharged substantially` at right angles tok thegrip, while the o-ther embodiment shown in Figures 7 to 12 ischaracterized by a construction having a conventional: squeeze grip inwhich the fluid is discharged,

substantially parallal to the grip.

The valve assembly of veach embodiment-vis` identical, and this will beevident from a com- The actuating lever of each embodiment is alsoquitesimilar in construction inasmuchas each lever is preferably astamping havngtwo` arms 2A with cam type actuating surfaces 2B` 25 thatengage annular rings 4B on a hollow ploys a compression spring I6 foroperating thei valve assembly to a closed condition, whilev theembodiment shown in Figures 7 to 1,2 employsI a tension spring I9-.

embodiment is quite similar, and for a detail description thereofreference is rst made to Figures 1 to 6. In-Figure 1, the numeral Idesignatesa housing having a grip portion IG and an eye III for hangingthe gun when the same is not in us`e.`"

As shown in Figures 1 and 3, the actuating ing surfaces 2B that engageannular rings 4B carried by the hollow plunger 4, and each army ispivotally mounted within the housing I upon a suitable bearing-pin 3that is threaded into one Wall of the housing I.

As shown in Figures 1, 2 and 4 the actuating lever 2 is constructed tomove into the housing I when the same is actuated to open the valve" Asshown in Figure 1, a compression spring=fl6 reacts between the lever 2and a shouldered ad-Y justing-screw I5, to bias the valve to its 'closedOtherwise, except for theI difference in construction of the housings,each 3 condition. The adjusting screw I is threaded into the housing Iso that the screw may be adjusted to regulate the closing pressure uponthe valve.

As shown vin Figures 1 and 5, the hollow plunger 4 terminates at itsrear end in a spherical guide 4S having a threaded neck 4E extendingdiagonally upwardly therefrom. A hanged hose connection is detachabl'y`secured tothe threaded neck 4E by means of a threaded cap 5.

As indicated in Figure 1, the top of the housing-I is slotted at therear end thereof, and the reduced cylindrical portion of the threadedneck 4E reciprocates therein to prevent Athe plunger 4 from beingrotated about its longitudinal axis.

As shown in Figure 5 the hose connection 6 has a hollow bore 6Acommunicating with a-hol'- low bore 4A in the plunger 4, and, as shownin Figures 5 and 6, the plunger 4 has a cylindrical' guide 4G journaledin a cylindrical bore formed afi-externally threaded -bess IN of thehousing I so that it will reciprocate therein when the lever 2-isa'ctuatedl As shown in Figure '6, the guide 4G of the plunger y4 has a;valves'tem I2 threadedy intor the forward endthereof. A diaphragm I4,preferably made' of rubber, Vserv/es to seal the valve chamber, and thisdiaphragm is detachably secured at its central portion lbetween the endof the 'guide 4G and the hexagon portion of the valve stem I2. A washert3 is provided between the; hexagn portion of' the `valve stern I2 andthe 'diaphragm I4 to prevent damage tothe 'diaphragm` when the-assemblyis tightened.

The diaphragm t4l is detachabiy secured at its periphery between the endof the threaded boss IlSI' ofv the housing I, and the flanged end 8Aofthe valve bonnet 8.

AS shown in Figure 6,.the anged endr 8A of the valve, bonnet 8 isdetachally secured to `the threaded boss IN of the housing I. by meansof a threaded'sleeve -'I. The inwardly extending flange on sleeve 1engages the outwardlyv extending ilang'e 8A onhonnet 8,.

The Valve bonnet 8 has a threaded end 8B to which is detachably secureda, threaded. cap 9 having a discharge aperture 9A. A renewable valveseat IILcOnSiSting. of ya thin Washer having a small: discharge orice-IIJA, is located within tile-capey aridis detachably secured to the end8B of the valve bonnet 8: byv means ofy thev'capv 9. A. gasket II sealsthe Valve seat I0 te the end 8B- of the valvebonnet 8.

The, outer end of theV valve stem I2 is provided withaslightly enlargedAguide I2A that is slidably journaled in the bore 8D of the valve? bonnet8. Thegude I2A- is also provided with diagonalA slots I2-B out in thecylindrical surface thereof, to breakthe iluid into a finemist.

As showninFigure, the guide IZA is slidably mounted within the boret 3Dor the valve bonnet 8',1and the hexagon portion ofV the valve-stem I2operates withiny theI chamber 8C of the bonnet.`

ThevalveY stem I2 is provided with a hollow bore I2C coinn'iunicatingvwith `the' hollow bore 4A of the plungerf4'. The valve stem I=2is alsoproa vided with transverse: openings If2D'con1municating with the bore I2C.

li'ccordingly,l with reference toFigures 5 andv 6. fluid= entering boreVGA ofl the hose connection 6, travels forwardly through the bore-4A'ofplunger 4 into thebore I 12C'0f stenr I2 andthence throughthe'openings I`2-Dintochamber 8C of= bonnet 8:

Afiwasher I-2W, preferably'made from phenol 4 aldehyde product, isvxedly secured in the forward end of the valve stem I2, which washerseals the small discharge orifice IA in the valve seat I2 to provide theclosed condition for the valve.

When the grip IG and lever 2 is squeezed 'by an operator, the camsurfaces 2B of the lever 2 .press against the corresponding ring 4B andmove the hollow plunger 4 rearwardly. The valve stem I2 also movesrearwardly with the plunger 4, and the fluid flowing through the bores6A, 4A and I2C discharges into the chamber 8C of the valve bonnet 8 viaopening |2D, thence through the bore 8D, diagonal slots IZB, and thesmall discharge orifice IUA into atmosphere in the form of anextremelyne mist. When the lever 2 is released, the spring I6 reclosesthe valve by moving the washer IZ'W into sealing relation with theori-ce IIIA.

From the foregoing, it will be apparent that the bores` GA, 4A and I2C,and the' transverse openings `IED provide aA directcommunication forthe' uid flowingr 'into' the valve' chamber;` greatly simplifymanufacture and maintenance of thetalve assembly.

In the operation of water-spray guns inv laundries and dry cleaningestablishments, it customary toy installal chamber in the' steaml supplyline to collect water'of condensation therefrom, and' to extendafilexiblel hosefrom the lower end of the 'chamber' to the" hoseconnection 6 of the spray gun, to conduct 'condensation to the'fg-un`under the pressure' 'or the steam flowing invr the steam'supply line;

Experience has shown this te be' the preferredA manner of operatingwater-spray'guns as it eluninates entirely liming-'over andv cloggingthatis ordinarily encoimtered when sprayv guns receivewater fromdomestic water lines.

On thei'other hand; itis to lbe understood" that the featuresdisclosed-herein are applicable to`v spray guns operated onuids otherthan theconden'sation. 'specifically 'mentionedherein y'For' aY detaileddescription' or the' other einbddiment of the inventiondisclosed"hereinrreferencel is madefto Figures '7 to 121 In FigureL'7,'the numeral /I designatesa housing' having a grip portion' IG.(run'sfof` the squeeze type` 'arecustomarily employed to meistenarticles on a horizontal surface, andtherefore`usi'ially' hangvertically abdve the 'surface' from a; spring attached' 'to the hose,while guns of thepistol grip`I type are customa.`rilyfV employed tomeisten' articles hang-ingina verticalposition.

As shown in Figures 7 and 9, the actuatingv lever 2' is preferably'alSheet-metal stampingha-ving two arms 2A siiradulingF a` hollow .plunger4. Each arm ZAJhas a1 pair of: cam-type 'actuating surfaces 2B thatengage an annular ring'B andV4 As shown in Figure 7, a tensiony springIll secured to the-lever 2 at Il andlto theheusin'gt I a-t |18,V tobiastlie'valve toiitsfclo'sed condition.

As shown in- Figures 7, 8- and` 1l, the hollow` plunger 4= has, nearit's rear end; a square-guide 4D having a rearwardly-extendingthreaded`Y shank 4E. A flanged hosecnnection is detachably securedtothe-threadedshank'dll'by means of'a` threadedcap 5.A

As shown in Figures 8 andl 11', the square guide 4D is slidablyjournaled in a square opening ID in the housing I, to prevent theplungery 4 from being rotated about its longitudinal axis.

As shown in Figure l11, the hose connection 6 has a hollow bore 6A.communicating with hollow bore 4A in the plunger 4, and,.as shown inFigures 7, 11 and 12, the plunger 4 has a cylindrical guide 4G slidablymounted in the boss portion IN of the housing I, so that .it willreciprocate therein when the lever 2 is actuated. i 1

As shownin Figure `12, theguide 4G of the plunger 4 has a valve stem I2threaded into .the

forward end thereof. A diaphragm I4, preferably made from rubber, servesto seal the valve chamber, and this diaphragm is detachably secured atits central portion between the end of the guide- 4GA andthe hexagonportion of the valve stem I2. A washer I3 is provided between thehexagon portion of the valve stem I2 and the diaphragm I4, to preventdamage to the diaphragm when the assembly is tightened. Y,

'I'he diaphragm I4 is detachably secured at its periphery between theend of the threaded boss IN ofthe housing I and the flanged end 8A ofthe valve bonnet 8.

As shown in Figure 12, the flanged end 8A of the valve bonnet-8is-detachably secured to the threaded Aboss IN of the housing I by meansof a threaded sleeve 1.

The valve bonnet 8 has a-threaded end 8B to which is ldetachablysecured' a threaded cap 9 having a discharge aperture 9A,l A renewablevalve seat I0, consisting of a thin washer having a smally dischargevorifice IIIIA,` is 'located within the cap 9, and is detachably securedto the end 8B of the valve bonnet 8 by means of cap 9. A gasket I Iseals the valve seat I0 to the end 8B of the valve bonnet 8.

The outer end of the valve stem I2 is provided with a slightly enlarged-gulde I2A that is slid-- ably journaled in the bore 8D of the valvebonnet 8. The guide I2A is also provided with diagonal slots I2B cut inthe cylindrical surface thereof, to break the fluid into a flne mist.

As shown in Figure 12, the guide I2A is slidably mounted within the bore8D of the valve bonnet 8, and the hexagon portion of the valve stem I2operates within the chamber 8C of the bonnet 8.

The valve stem I2 is provided with a hollow bore I2C communicating withthe hollow bore 4A of the plunger 4. The valve stem I 2 is also providedwith transverse openings I 2D communicating with the bore I2C.

Accordingly, with reference to Figures '7, 1l and 12, it will be seenthat fluid entering bore 6A of the hose connection 6 travels forwardlythrough the bore 4A of plunger 4 into bore I2C of stem I2, and thencethrough the openings I2D into the chamber 8C of bonnet 8.

A Washer I2W, preferably made from a phenolaldehyde product, is llxedlysecured in the forward end of the valve stem I2, which washer seals thesmall discharge orice IDA in the valve seat I2 to provide the closedcondition for the valve.

When the grip IG and lever 2 is squeezed by an operator, the camsurfaces 2B of lever 2 press against the end of the square guide 4D andmove the hollow plunger 4 rearwardly. The valve stem I2 also movesrearwardly with the stem 4, and the fluid flowing through the bores 6A,4A and I2C discharge into chamber 8C of valve bonnet 8 via openings I2D,thence through the bore 8D,

diagonal slots I2B and the small `discharge orifice IIIA into atmospherein the form of an extremely fine mist. When the lever 2 is released, thetension spring I9 biases the valve toits closed condition.

From the foregoing it will be apparent that the hollow plunger 4provides a direct communication for the fluid from the bore 6A of hoseyconnection 6 through the bore I2C and openings I2D into the valvechamber, and that this construction, along with the construction of thevalve assembly, is identical in both embodiments shown in theaccompanying drawings.

Having thus described the invention, I claim:

1. A valve structure comprising a. body member adapted to be held by thehand, and having an externally threaded boss extending outwardlytherefrom; a cylindrical valve casing having a cylindrical valve cavityandan outwardly extending cylindrical flange on one end thereof; aninternally threaded sleeve threaded upon the threaded boss and having aninwardly extending flange engaging the flange of the casing and securingthe same to the end of the threaded boss; an internally threaded valvecap closed at one end by a Wall having a discharge opening therein; thesaid `valve casing `having an externally threaded end receiving theinternally threaded valve cap; a replaceable valve seat within saidvalve cap comprising an apertured disk clamped between the threaded endof saidv valve casing and the end wall of saidcap, a valve stem posi-ltioned in the said valve cavity and mounted for reciprocation axiallythereof to closeand open' the discharge opening, and a flexible diskhaving its peripheral portion clamped between said casing flange and theend of said boss and the central portion thereof sealed around saidvalve stem, said valve stem having an axial bore extending through theplane of said disk and opening through the side of the stem into saidvalve cavity.

2. A valve structure comprising a hollow body member having a. gripportion adapted to be held by the hand, and havinga longitudinal openingalong one side thereof; a cylindrical casing having a cylindrical valvecavity and provided with an outwardly extending flange on one endthereof; an internally threaded sleeve slipped over the said casing andhaving an inwardly extending flange engaging the flange of the casing;the said body member having an externally threaded boss receiving theinternally threaded sleeve for securing the casing to the body member;an internally threaded valve cap closed at one end by a wall having adischarge opening therein and a valve seat surrounding the opening; thesaid valve casing having an externally threaded end receiving theinternally threaded cap for securing the valve seat axially in alignmentwith the cylindrical valve cavity; a valve stem slidably mounted in thehollow body member and extending into the valve cavity and mounted forreciprocation axially thereof to open and close the discharge opening; aflexible disk Ihaving its peripheral portion clamped between said casingflange and the end of said boss and the central portion thereof sealedaround said valve stem, said valve stem having an axial bore extendingthrough the plane of said disk ,and opening through the side of the steminto said valve cavity; an operating handle pivotally mounted within thehollow body member and having a free end portion thereof positioned inand extending lengthwise of the longitudinal opening in aai-13,676

said handle Withsaidvalve stem-fofaxiallyfrecip# re'catingr the valvelstem; and: spring' means mounted within the grip portion of saidI hollowbody and acting on said handle to urge'saidvalvefsternragainstsaidfvalve'seat. v

adapted to be held by the hand; an externally threaded boss extendingoutwardly from saidv bodyand hav-ing a-'c'ylindrical bore formed thereavalve' bonnet-having afcyli-ndrical valvecavity land providedWithffanrfoutwardly extending' circular angeori one 'end thereof; aninternally threaded sleeve threaded-uponsaid boss andl havingarfi-nwardrlyextending: flange engaging the flangefofv said-bonnet andsecuring 'theV same to the' .enda ot =saidboss-i'with saidvalvev cavityin axial alignment' with thefcylindricalf-bore -of said boss;anenternally threaded valve capolosed at one end'by a Wall having adischarge lopening therein; saidhvalve bonnet havingl anV externallythreaded forward end rreceiving `the vinternally threaded valve `cfaparreplaceablel Valve seat within! said valve cap comprising ani apertureddisk clamped betweenthe forward end of saidT bonnetand .the endYWally-of said cap, a hollowy plunger havingone end mounted inthe cy1indricaL bore of saidboss and the othery end' eX-.

tending out off-said-body and adapted for connection toa source of' uid;a` valve steiriposi-` tioned inl said valve cavity in Kaxial alignmentwith' said plunger and bein-g secured tothe end.

of'saidplunger bya threaded stem portion; said plunger and valvestembeingmountedffor` recip-` 8f rocation. axiallyAv thereof toy closeandopen the discharge opening in'. said valvez capandl a flexi-y bledisk' having its peripheral .portion clamped between: said bonnetalngeand'theendof said boss and having an'apert'ure-at the center' thereof,the portion of said' disk surrounding sa'id aperture being clamped.betweenl thev abutting end faces of said plunger'an'd said'valve stein,Whereby said disk seals the-rearend of saidvalve cavity,

and said valve stem having an' axial bore extend-- ing from the rearendth'ereof through 'the plane' of said disk'and operiirigthrouhthefsidelofrthe stemfinto 'said. valveicavity. RICHTRxEssINd. 'l

.EEFERNCES C11-inn, The following references are of 'record inl `the leof this patent: :l 4 UMTTSTATES. PATENTS Number l I July 28,1936

